Tool-holder.



No. 885,058. PATENTED APR. 21, 1908.

' G. R. "LANG.

TOOL HOLDER.

APPLICATION FILED APR.18, 1906.

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Specification of Letters Patent.

Patented April 21, 1908.

Application filed April 18, 1906. Serial No. 312,829.

To all whom it may concern:

Be it known that I, GEORGE E. LANG, a citizen of the United States, residing at Meadville, in the count of Crawford and State of Pennsylvania, ave invented new and useful Im rovements .in Tool-Holders,-

of which the fo owing is a specification.

This invention relates to tool holders and consists in certain improvements in the construction thereof as will be hereinafter fully described and pointed out in the claims.

The invention is illustrated in the accompanying drawings as follows Figure 1 is a plan view of the tool holder. Fig. 2, a side elevation of the same. Fig. 3, a front elevation. Fig. 4, a rear elevation.

'lhe'tool holder has the u er section A and the lower section B. ese sections have the slots a and b extending through the rear ends thereof from top-to bottom and the tongue C is arranged in these slots. This is riveted by means of the rivet b to the section B and is hinged by means of the pin a on the section A, so that the two sections are hinged together. The opposin faces ofthe sections are provided with t e grooves 11 and b These grooves are in register when the sections are in pro er position so that the tool D extends art y into both grooves. The groove is 0 such de th relatively to the thickness of the tool that the faces of the sections do not uite contact. i

The sections ave the In s a and 12 extending from the sides of t e sections and near the front of the same. The clampin screw E is passed through the lug a, an screwed into the lugt The inner parts, a and b of the faces of the lugs a and I) are cut away so that onl the outer edges 0, and b are in contact. he purpose of'this' is to make sure that the clampin effect of the screw is delivered on the tool In order to better provide the tool holder for making a very heavy cutting, ordinarily known as. a roughin cut, I provide the part B with the forwar extendin' side 11p 1) and bottom lip b. l ese exten to near the end of the tool and to points opposite the cutting edges of the-tool so thatwith' the deep roughing cut, the tool is supported at points directly 0 posits from thepart under strain. With t 13 construction, the light steel used with these tools may be utilized with the roughing cut; this has not been heretofore usual.

It will be noted that the rear ends of the parts A and B are adapted to be inserted m an ordinary 'tool 0st and to receive the clamping action of the ordinary tool post screw so that while in use the tool D is subjected to not only the clamping effect of the screw E but also the clamping effect from the tool 0st.

at I claim as new is:

1. In a tool holder the combination of the up er and lower sections adapted when toget er to be inserted in the ordinary tool post of a: lathe and to be clamped thereby and having lon 'tudinal grooves in their opposing faces a aphted to receive a tool and each provided wit a laterally protrudmg lug near its front end with a projection from one of the opposing faces of the lugs on the side of the lug the more remote from the' groove for engaging the opposing face of the op osing lug wit the o posing faces of the ugs when in parallel relation for the purpose de-' scribed; and a clamping screw arranged in said lugs.

2. In a tool holder the combination of the upper and lower sections, having the longitudlnal grooves in their opposing faces; a clamp at the front ends of sai sections; and a hinge joint at the rear end of said sections comprismg the tongue C arranged in the slots in the ends of the sections, the ends of the groove forming parts of the slots.

3. In a tool holder the combination of the upper and lower sections, having longitudina ooves in their opposing faces; the lower section having the projecting lips I) and b for supporting the side andbottom of an inserted tool at' points opposite the cutting edge ofthe tool; and means for clamping the sections together.

In testimony whereof I have hereunto set I my hand in the presence of two subscribing wltnesses.

CLINT Dnnsmo'nn, Ronna'r MCWILLIAMS.

out of contact on t e side nearer the groove 

